Brian wrote:
> Noclean is hard to clean and may be conductive. I had problems in rf
> circuits even with my mega8 running at 8MHz. Just today I reworked 21 QFN's
> with water soluble flux and just swishing them in a tub of 140 degree water
> and drying the board they worked at 1 GHz. There was no problem washing the
> flux from under the part, it seems.
I was under the impression that most water-soluble fluxes were corrosive to
some degree, and that No-Clean wasnt?
Although to be truthful I tend to use rosin-core solder wire and clean with
IPA. Not sure what's in the solder paste, though (without digging it out of
the sealed bag in the fridge and reading the label, anyway).
--
Phil.
ygroups@...http://www.philpem.me.uk/